A. 不变 B. 减少 C. 增大 D. 无法确定
A. the chocks at the bow of a towed vessel B. the most forward，centermost point of a towed vessel such as a sturdy bow rail C. the mast of a towed sailboat D. a secure fitting near the bow of the towed vessel
A. 油环多、气环少 B. 气环多、油环少 C. 只有油环、没有气环 D. 只有气环、没有油环
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